/* ===== CSS Variables (Blue & Black Theme) ===== */
:root {
  --color-primary: #3b82f6;
  --color-primary-dark: #2563eb;
  --color-primary-glow: rgba(59, 130, 246, 0.35);
  --color-primary-light: rgba(59, 130, 246, 0.12);

  --color-black: #050508;
  --color-black-soft: #0c0c12;
  --color-black-card: #111118;
  --color-black-elevated: #18181f;

  --color-text: #f1f5f9;
  --color-text-muted: #94a3b8;
  --color-text-dark: #0f172a;

  --color-bg: #050508;
  --color-bg-alt: #0c0c12;
  --color-bg-card: #111118;
  --color-border: rgba(148, 163, 184, 0.15);
  --color-border-strong: rgba(59, 130, 246, 0.35);

  --color-shadow: rgba(0, 0, 0, 0.4);
  --color-shadow-hover: rgba(59, 130, 246, 0.2);

  --font-family: "Segoe UI", "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Yu Gothic UI", Meiryo, sans-serif;
  --max-width: 1100px;
  --header-height: 68px;
  --radius: 14px;
  --transition: 0.2s ease;
}

/* ===== Reset & Base ===== */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-height);
}

body {
  font-family: var(--font-family);
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-text);
  background-color: var(--color-bg);
  background-image:
    radial-gradient(ellipse 80% 50% at 50% -20%, rgba(59, 130, 246, 0.18), transparent),
    radial-gradient(ellipse 60% 40% at 100% 0%, rgba(37, 99, 235, 0.08), transparent);
  min-height: 100vh;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition);
}

a:hover {
  color: #60a5fa;
}

img {
  max-width: 100%;
  display: block;
}

ul {
  list-style: none;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== Header ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-height);
  background: rgba(5, 5, 8, 0.88);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
  gap: 16px;
}

.logo {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--color-text);
  letter-spacing: -0.02em;
  flex-shrink: 0;
}

.logo span {
  color: var(--color-primary);
}

.logo:hover {
  color: var(--color-text);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.nav-user {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  white-space: nowrap;
}

.site-nav ul {
  display: flex;
  align-items: center;
  gap: 28px;
}

.site-nav a {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-text-muted);
  position: relative;
}

.site-nav a::after {
  content: "";
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-primary);
  transition: width var(--transition);
}

.site-nav a:hover {
  color: var(--color-text);
}

.site-nav a:hover::after {
  width: 100%;
}

.site-nav--compact ul {
  gap: 16px;
}

.nav-toggle {
  display: none;
}

.nav-toggle-label {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 28px;
  height: 28px;
  cursor: pointer;
}

.nav-toggle-label span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  border-radius: 10px;
  border: none;
  font-size: 0.9375rem;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: #fff;
  box-shadow: 0 4px 16px var(--color-primary-glow);
}

.btn-primary:hover {
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 8px 24px var(--color-primary-glow);
}

.btn-ghost {
  background: transparent;
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
}

.btn-ghost:hover {
  color: var(--color-text);
  border-color: var(--color-border-strong);
  background: var(--color-primary-light);
}

.btn-sm {
  padding: 8px 16px;
  font-size: 0.8125rem;
  border-radius: 8px;
}

.btn-block {
  width: 100%;
}

/* ===== Hero ===== */
.hero {
  padding: 120px 0 100px;
  text-align: center;
}

.hero-inner {
  position: relative;
}

.hero-label {
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: 12px;
}

.hero h1 {
  font-size: clamp(2.75rem, 7vw, 4.5rem);
  font-weight: 900;
  letter-spacing: -0.04em;
  color: var(--color-text);
  margin-bottom: 16px;
  line-height: 1.1;
}

.hero h1 span {
  background: linear-gradient(135deg, #60a5fa 0%, var(--color-primary) 50%, #1d4ed8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-tagline {
  font-size: clamp(1rem, 2.5vw, 1.25rem);
  color: var(--color-text-muted);
  max-width: 520px;
  margin: 0 auto 36px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
}

/* ===== Sections ===== */
.section {
  padding: 80px 0;
}

.section-alt {
  background: var(--color-bg-alt);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.section-title {
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.section-lead {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 40px;
}

.about-content {
  max-width: 720px;
}

.about-content p + p {
  margin-top: 16px;
}

.about-content p {
  color: var(--color-text-muted);
  font-size: 1.0625rem;
}

/* ===== Cards ===== */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px;
}

.card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 28px;
  transition: box-shadow var(--transition), transform var(--transition), border-color var(--transition);
}

.card:hover {
  box-shadow: 0 12px 32px var(--color-shadow);
  transform: translateY(-4px);
  border-color: var(--color-border-strong);
}

.member-avatar {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--color-primary-light);
  color: var(--color-primary);
  font-size: 1.375rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  border: 1px solid var(--color-border-strong);
}

.member-card h3,
.activity-card h3 {
  font-size: 1.125rem;
  font-weight: 700;
  margin-bottom: 4px;
  color: var(--color-text);
}

.member-role {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 12px;
}

.member-bio,
.activity-card p {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
}

.activity-icon {
  font-size: 2rem;
  margin-bottom: 16px;
}

.activity-card h3 {
  margin-bottom: 8px;
}

/* ===== Contact ===== */
.contact-content {
  max-width: 560px;
}

.contact-content > p {
  color: var(--color-text-muted);
  margin-bottom: 24px;
}

.contact-links {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.contact-link {
  display: inline-flex;
  align-items: center;
  font-size: 1rem;
  font-weight: 500;
  padding: 14px 18px;
  border: 1px solid var(--color-border);
  border-radius: 10px;
  background: var(--color-bg-card);
  color: var(--color-text);
  transition: border-color var(--transition), background var(--transition), color var(--transition);
}

.contact-link:hover {
  border-color: var(--color-border-strong);
  background: var(--color-primary-light);
  color: var(--color-primary);
}

/* ===== Footer ===== */
.site-footer {
  padding: 32px 0;
  border-top: 1px solid var(--color-border);
  text-align: center;
}

.site-footer p {
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

/* ===== Auth Pages ===== */
.auth-page,
.admin-page {
  background-color: var(--color-bg);
}

.auth-main,
.admin-main {
  min-height: calc(100vh - var(--header-height));
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 48px 24px;
}

.auth-card {
  width: 100%;
  max-width: 440px;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 40px 36px;
  box-shadow: 0 24px 48px var(--color-shadow);
}

.auth-card--admin {
  max-width: 480px;
}

.auth-label {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.auth-card h1 {
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--color-text);
  margin-bottom: 8px;
}

.auth-lead {
  color: var(--color-text-muted);
  font-size: 0.9375rem;
  margin-bottom: 28px;
}

.auth-form {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.form-group label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-text);
}

.form-group input {
  width: 100%;
  padding: 12px 14px;
  border-radius: 10px;
  border: 1px solid var(--color-border);
  background: var(--color-black-soft);
  color: var(--color-text);
  font-size: 0.9375rem;
  font-family: inherit;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.form-group input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-light);
}

.form-message {
  font-size: 0.875rem;
  padding: 10px 12px;
  border-radius: 8px;
}

.form-message--error {
  background: rgba(239, 68, 68, 0.12);
  color: #fca5a5;
  border: 1px solid rgba(239, 68, 68, 0.25);
}

.form-message--success {
  background: rgba(34, 197, 94, 0.12);
  color: #86efac;
  border: 1px solid rgba(34, 197, 94, 0.25);
}

.auth-footer-text {
  margin-top: 24px;
  text-align: center;
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

/* ===== Admin Dashboard ===== */
.admin-section {
  width: 100%;
}

.admin-dashboard-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 36px;
}

.admin-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
  margin-bottom: 32px;
}

.admin-stat-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 24px;
}

.admin-stat-label {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  margin-bottom: 8px;
}

.admin-stat-value {
  font-size: 2rem;
  font-weight: 800;
  color: var(--color-primary);
}

.admin-stat-value--small {
  font-size: 1rem;
  font-weight: 600;
  word-break: break-all;
}

.admin-panel {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 28px;
}

.admin-panel h2 {
  font-size: 1.125rem;
  margin-bottom: 20px;
  color: var(--color-text);
}

.admin-table-wrap {
  overflow-x: auto;
}

.admin-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9375rem;
}

.admin-table th,
.admin-table td {
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid var(--color-border);
}

.admin-table th {
  color: var(--color-text-muted);
  font-weight: 600;
  font-size: 0.8125rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.admin-table td {
  color: var(--color-text);
}

.admin-empty {
  color: var(--color-text-muted);
  font-size: 0.9375rem;
  padding: 12px 0;
}

.admin-dashboard-container {
  padding-bottom: 48px;
}

.admin-main--dashboard {
  align-items: flex-start;
  padding-top: 32px;
}

.admin-panel + .admin-panel {
  margin-top: 24px;
}

.admin-panel-desc {
  color: var(--color-text-muted);
  margin-bottom: 16px;
}

.admin-control-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.admin-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  align-items: center;
  min-width: 280px;
}

.freeze-input,
.role-select {
  padding: 6px 8px;
  border-radius: 8px;
  border: 1px solid var(--color-border);
  background: var(--color-black-soft);
  color: var(--color-text);
  font-size: 0.8125rem;
  font-family: inherit;
}

.status-badge,
.role-badge {
  display: inline-block;
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
}

.status-badge {
  background: rgba(148, 163, 184, 0.15);
  color: var(--color-text-muted);
}

.role-badge--admin {
  background: rgba(59, 130, 246, 0.18);
  color: #93c5fd;
  border: 1px solid rgba(59, 130, 246, 0.35);
}

/* ===== Site Notification Ticker ===== */
body.has-notification {
  padding-top: 36px;
}

body.has-notification .site-header {
  top: 36px;
}

.site-notification {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 200;
  height: 36px;
  background: linear-gradient(90deg, #1d4ed8, #2563eb, #1d4ed8);
  color: #fff;
  overflow: hidden;
  border-bottom: 1px solid rgba(255, 255, 255, 0.15);
}

.site-notification-viewport {
  position: relative;
  width: 100%;
  height: 100%;
  overflow: hidden;
}

.site-notification-text {
  position: absolute;
  top: 50%;
  left: 0;
  white-space: nowrap;
  padding: 0 24px;
  font-size: 0.875rem;
  font-weight: 600;
  transform: translateY(-50%);
  will-change: transform;
}

/* ===== Maintenance Overlay ===== */
.maintenance-overlay {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: rgba(5, 5, 8, 0.94);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.maintenance-card {
  max-width: 420px;
  width: 100%;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 36px 32px;
  text-align: center;
}

.maintenance-card h2 {
  color: var(--color-text);
  margin-bottom: 12px;
}

.maintenance-card p {
  color: var(--color-text-muted);
}

/* ===== Messages ===== */
.message-panel {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 28px;
}

.message-panel h3 {
  margin-bottom: 16px;
  color: var(--color-text);
}

.message-form {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 24px;
}

.message-form textarea {
  width: 100%;
  padding: 12px 14px;
  border-radius: 10px;
  border: 1px solid var(--color-border);
  background: var(--color-black-soft);
  color: var(--color-text);
  font-size: 0.9375rem;
  font-family: inherit;
  resize: vertical;
}

.message-form textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-light);
}

.message-login-hint {
  color: var(--color-text-muted);
  margin-bottom: 20px;
}

.message-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.message-item {
  padding: 16px;
  border: 1px solid var(--color-border);
  border-radius: 10px;
  background: var(--color-black-soft);
}

.message-item-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 8px;
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

.message-date {
  display: block;
  margin-top: 2px;
  font-size: 0.75rem;
}

.message-edited {
  color: var(--color-text-muted);
  font-size: 0.75rem;
}

.message-owner-actions {
  display: flex;
  gap: 6px;
  flex-shrink: 0;
}

.message-action-btn {
  padding: 4px 10px;
  border-radius: 6px;
  border: 1px solid var(--color-border);
  background: transparent;
  color: var(--color-text-muted);
  font-size: 0.75rem;
  font-family: inherit;
  cursor: pointer;
  transition: border-color var(--transition), color var(--transition), background var(--transition);
}

.message-action-btn:hover {
  border-color: var(--color-border-strong);
  color: var(--color-text);
  background: var(--color-primary-light);
}

.message-action-btn--danger:hover {
  border-color: rgba(239, 68, 68, 0.4);
  color: #fca5a5;
  background: rgba(239, 68, 68, 0.12);
}

.message-footer {
  display: flex;
  gap: 8px;
  margin-top: 12px;
}

.vote-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border-radius: 999px;
  border: 1px solid var(--color-border);
  background: transparent;
  color: var(--color-text-muted);
  font-size: 0.8125rem;
  font-family: inherit;
  cursor: pointer;
  transition: border-color var(--transition), background var(--transition), color var(--transition);
}

.vote-btn:hover {
  border-color: var(--color-border-strong);
  color: var(--color-text);
}

.vote-btn--active {
  border-color: rgba(59, 130, 246, 0.45);
  background: rgba(59, 130, 246, 0.15);
  color: #93c5fd;
}

.vote-btn--dislike.vote-btn--active {
  border-color: rgba(239, 68, 68, 0.35);
  background: rgba(239, 68, 68, 0.12);
  color: #fca5a5;
}

.message-edit-form {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.message-edit-form textarea {
  width: 100%;
  padding: 10px 12px;
  border-radius: 8px;
  border: 1px solid var(--color-border);
  background: var(--color-bg-card);
  color: var(--color-text);
  font-size: 0.9375rem;
  font-family: inherit;
  resize: vertical;
}

.message-edit-actions {
  display: flex;
  gap: 8px;
}

.message-item-feedback {
  margin-top: 8px;
  font-size: 0.8125rem;
}

.message-item-header strong {
  color: var(--color-primary);
}

.message-item p {
  color: var(--color-text);
  font-size: 0.9375rem;
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .header-inner {
    flex-wrap: wrap;
  }

  .nav-toggle-label {
    display: flex;
  }

  .site-nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: var(--color-black-soft);
    border-bottom: 1px solid var(--color-border);
    padding: 0 24px;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
  }

  .site-nav ul {
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    padding: 8px 0 16px;
  }

  .site-nav li {
    width: 100%;
    border-bottom: 1px solid var(--color-border);
  }

  .site-nav li:last-child {
    border-bottom: none;
  }

  .site-nav a {
    display: block;
    padding: 14px 0;
  }

  .site-nav a::after {
    display: none;
  }

  .nav-toggle:checked ~ .site-nav {
    max-height: 420px;
  }

  .nav-toggle:checked + .nav-toggle-label span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }

  .nav-toggle:checked + .nav-toggle-label span:nth-child(2) {
    opacity: 0;
  }

  .nav-toggle:checked + .nav-toggle-label span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }

  .header-actions {
    order: 3;
    width: 100%;
    justify-content: flex-end;
    padding-bottom: 8px;
  }

  .hero {
    padding: 80px 0 64px;
  }

  .section {
    padding: 56px 0;
  }

  .card-grid {
    grid-template-columns: 1fr;
  }

  .auth-card {
    padding: 32px 24px;
  }

  .admin-dashboard-header {
    flex-direction: column;
  }
}